I just saw a review for the otterbox commuter series for the iphone 4 and I think its a case that I would want to try out. The only one thing i didnt really like about it is the inner portion in silicone, I have an incipio sillicrylic and although i love the case dust seems to collect under the silicone part because its so soft and flimsy. I was wondering if there is a case like this but with a harder inner potion like a TPU ?